You chose “I have a Bailiff’s letter or Bailiff’s appointment”. You need specialist debt advice.
You can still take action to protect your belongings right now. If Bailiffs are due in a day or two you can take action now to stop Bailiffs taking your stuff.
If Bailiffs are due soon you can take action to delay them.
If you are disabled or live with a long term illness you might be a ‘vulnerable person’. The Bailiff’s have to deal with you properly.